| First Author | Gitler AD | Year | 2004 |
| Journal | Pediatr Res | Volume | 55 |
| Issue | 4 | Pages | 581-4 |
| PubMed ID | 14739366 | Mgi Jnum | J:88133 |
| Mgi Id | MGI:3029156 | Doi | 10.1203/01.PDR.0000113462.98851.2E |
| Citation | Gitler AD, et al. (2004) Tie2-Cre-induced inactivation of a conditional mutant Nf1 allele in mouse results in a myeloproliferative disorder that models juvenile myelomonocytic leukemia. Pediatr Res 55(4):581-4 |
| abstractText | Neurofibromatosis type one (NF1) is a common genetic disorder affecting 1:4000 births and is characterized by benign and malignant tumors. Children with NF1 are predisposed to juvenile myelomonocytic leukemia. The Nf1 gene encodes neurofibromin, which can function as a Ras GTPase-activating protein. Neurofibromin deficiency in mice leads to mid-gestation lethality due to cardiovascular defects. We have previously shown that conditional inactivation of Nf1 using Tie2-Cre recapitulates the heart defects seen in Nf1(-/-) embryos. Tie2-Cre transgenic mice express Cre recombinase in all endothelial cells. Here, we show that Tie2-Cre-mediated deletion of Nf1 also leads to excision of Nf1 in the hematopoietic lineage. Surviving mice exhibit a myeloproliferative disorder similar to juvenile myelomonocytic leukemia seen in NF1 patients. These mice provide a useful model to study neurofibromin deficiency in hematopoiesis. Furthermore, defects in Tie2-Cre-expressing progenitors that result in heart and blood defects suggest that related heart and blood disorders in NF1 and other syndromes represent disorders of the hemangioblast. |
